docs: def mount(self,
                fstype=None,
                options=None,
                auth_no_user_interaction=None):
          """Mount filesystem."""
          return self._M.Filesystem.Mount(
              '(a{sv})',
              filter_opt({
                  'fstype': ('s', fstype),
                  'options': ('s', ','.join(options or [])),
                  'auth.no_user_interaction': ('b', auth_no_user_interaction),
              })
          )